I don't expect anyone to put up with it if they don't want to, but the power of human connection is much stronger than you're giving it credit for. Approaching someone from a place of nonjudgment and asking well-placed questions can really get some people thinking. Acting respectful and nonjudgmental is paramount to gaining respect and opening up the conversation to other possibilities.
I'm in no way implying this is going to work for any one specific person, especially your father, but it absolutely does work to moderate some people's beliefs.